Which organelle has a double membrane

Plz plz plz quick! 49 points for whoever which of the following statements about greenhouse effect is true? *life on earth is suffering because of greenhouse effect *the greenhouse effect is caused by human activity *all greenhouse gases are harmful *life on earth would not exist without the greenhouse effect

Explain how ancient whale fossils found in eqypt are believed to support the theory of evolution.

What is usually (but not always) related to the metabolic processes of living organisms in its organic form?